Aerial attack to continue on Angeles National Forest fire

A Los Angeles County Firefighter helicopter drops water on a wildfire burning through 3,600 acres of the Angeles National Forest on Tuesday Sept. 4, 2012 near Glendora, Calif.

NBC News staff and wire reports: A brush fire in the San Gabriel Mountains that prompted the evacuation of campers and picnickers in the hills above Glendora, Calif., continued to rage Tuesday and it could be several days before crews gain the upper hand.